From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3019C4361B for ; Fri, 11 Dec 2020 03:42:30 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 29A9F23E55 for ; Fri, 11 Dec 2020 03:42:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 29A9F23E55 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 8C51F6B0036; Thu, 10 Dec 2020 22:42:29 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 84F266B005D; Thu, 10 Dec 2020 22:42:29 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6EFE56B0068; Thu, 10 Dec 2020 22:42:29 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0036.hostedemail.com [216.40.44.36]) by kanga.kvack.org (Postfix) with ESMTP id 557306B0036 for ; Thu, 10 Dec 2020 22:42:29 -0500 (EST) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 1049B180AD83A for ; Fri, 11 Dec 2020 03:42:29 +0000 (UTC) X-FDA: 77579604018.21.pig50_2c0253a273fd Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id EA7C2180442C3 for ; Fri, 11 Dec 2020 03:42:28 +0000 (UTC) X-HE-Tag: pig50_2c0253a273fd X-Filterd-Recvd-Size: 3925 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf21.hostedemail.com (Postfix) with ESMTP for ; Fri, 11 Dec 2020 03:42:28 +0000 (UTC) Date: Thu, 10 Dec 2020 19:42:27 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1607658147; bh=aVyB5tvoBROSnm5VRT1WJXpC3r3ukn7gssJ/P/aK8BQ=; h=From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=d4z+H2AlZ5RQve9ZA2JjgR1LoxIXv2qg3Ccm4s2aqerrNVxoS6rNxgN9BbEw3FbPL SufuqdVrNfBOMIQg8daSdQzMkr4EwiQwOelmiwdaTt3dcPvLgMmuw7Zt8tGgSYuHsX rIfgc+/WLk1H3Onm5ikwWbZLdIqZkqRk0zyXhqfKgxEV5VhdkGSYESl3dBMYZKPAH/ MGJRizsFpvZKqx7HxOsVPMewaiiRUWVf23j55uluw+Slz9KZxGdYoCyphRHa9NSmFv 6RcpDgo3u7ND9yJeI8vdEViR6/XSKJZtsS/fy9pxvQ2H5TFZeEOHro3dCKIrNB2Ry3 Y7/cC/Q1cAu/g== From: "Paul E. McKenney" To: Joonsoo Kim Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, andrii@kernel.org, Christoph Lameter , Pekka Enberg , David Rientjes , linux-mm@kvack.org Subject: Re: [PATCH v3 sl-b 1/6] mm: Add mem_dump_obj() to print source of memory block Message-ID: <20201211034226.GA2116@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <20201211011907.GA16110@paulmck-ThinkPad-P72> <20201211012003.16473-1-paulmck@kernel.org> <20201211022205.GA11631@js1304-desktop> <20201211033359.GD2657@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201211033359.GD2657@paulmck-ThinkPad-P72> User-Agent: Mutt/1.9.4 (2018-02-28) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Dec 10, 2020 at 07:33:59PM -0800, Paul E. McKenney wrote: > On Fri, Dec 11, 2020 at 11:22:10AM +0900, Joonsoo Kim wrote: > > On Thu, Dec 10, 2020 at 05:19:58PM -0800, paulmck@kernel.org wrote: > > > From: "Paul E. McKenney" [ . . . ] > > We can get some infos even if CONFIG_SLUB_DEBUG isn't defined. > > Please move them out. > > I guess since I worry about CONFIG_MMU=n it only makes sense to also > worry about CONFIG_SLUB_DEBUG=n. Fix update. Like this? (Patch on top of the series, to be folded into the first one.) Thanx, Paul ------------------------------------------------------------------------ diff --git a/mm/slub.c b/mm/slub.c index 0459d2a..abf43f0 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3920,21 +3920,24 @@ int __kmem_cache_shutdown(struct kmem_cache *s) void kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct page *page) { -#ifdef CONFIG_SLUB_DEBUG void *base; - int i; + int __maybe_unused i; unsigned int objnr; void *objp; void *objp0; struct kmem_cache *s = page->slab_cache; - struct track *trackp; + struct track __maybe_unused *trackp; kpp->kp_ptr = object; kpp->kp_page = page; kpp->kp_slab_cache = s; base = page_address(page); objp0 = kasan_reset_tag(object); +#ifdef CONFIG_SLUB_DEBUG objp = restore_red_left(s, objp0); +#else + objp = objp0; +#endif objnr = obj_to_index(s, page, objp); kpp->kp_data_offset = (unsigned long)((char *)objp0 - (char *)objp); objp = base + s->size * objnr; @@ -3942,6 +3945,7 @@ void kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct page *page) if (WARN_ON_ONCE(objp < base || objp >= base + page->objects * s->size || (objp - base) % s->size) || !(s->flags & SLAB_STORE_USER)) return; +#ifdef CONFIG_SLUB_DEBUG trackp = get_track(s, objp, TRACK_ALLOC); kpp->kp_ret = (void *)trackp->addr; #ifdef CONFIG_STACKTRACE